test_monitor.rb: fix leaked threads

* test/monitor/test_monitor.rb (test_killed_thread_in_synchronize):
  join work threads not to leak threads.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46138 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 0 deletions

diff --git a/test/monitor/test_monitor.rb b/test/monitor/test_monitor.rb
index 1d70222b44..8bd15ff55a 100644
--- a/test/monitor/test_monitor.rb
+++ b/test/monitor/test_monitor.rb
@@ -78,6 +78,9 @@ class TestMonitor < Test::Unit::TestCase
       ary << :main
     end
     assert_equal([:main], ary)
+  ensure
+    t1.join
+    t2.join
   end
 
   def test_try_enter